Satellite clock error forecasting method

A satellite clock error forecasting method comprises the following steps: step 1, acquiring an original clock error data sequence, and carrying out data preprocessing; step 2, performing primary ratio processing on the preprocessed clock error data sequence to obtain a new modeling data sequence; step 3, constructing a gray model in a discrete form according to the newly obtained level ratio data sequence; step 4, calculating parameters of the discrete grey model according to a least square method, performing level ratio forecasting according to the calculated discrete grey model, and fully mining grey information in the modeling clock error data sequence; and step 5, carrying out starting point deviation correction, and carrying out reduction processing according to the corrected model so as to realize satellite clock error high-precision prediction. 一种卫星钟差预报方法，步骤1：获取原始钟差数据序列，并进行数据预处理；步骤2：对所得预处理后的钟差数据序列作一次比处理，得到新的建模数据序列；步骤3：根据新得到的级比数据序列构建离散形式的灰色模型；步骤4：根据最小二乘法解算所述离散灰色模型的参数，根据解算后的离散灰色模型进行级比值预报，充分挖掘建模钟差数据序列中的灰信